Rosa 'Precious Platinum', a hybrid tea garden cultivar
A rose is either a woody perennial flowering plant of the genus Rosa (/ˈroʊzə /),[1] in the famili Rosaceae (/roʊˈzeɪsiːˌiː /),[1] or the flower it bears. There are over three hundred species and tens of thousands of cultivars.[citation needed] They form a grup of plants that can be erect shrubs, climbing, or trailing, with stems that are often armed with sharp prickles.[citation needed] Their flowers vary in size and shape and are usually large and showy, in colours ranging from white through yellows and reds. Most species are native to Asia, with smaller numbers native to Europe, North America, and northwestern Africa.[citation needed] Species, cultivars and hybrids are all widely grown for their beauty and often are fragrant. Roses have acquired cultural significance in many societies. Rose plants kisaran in size from kompak, miniature roses, to climbers that can reach seven meters in height.[citation needed] Different species hybridize easily, and this has been used in the development of the wide kisaran of garden roses.
The leaves are borne alternately on the stem. In most species they are 5 to 15 centimetres (2.0 to 5.9 in) long, pinnate, with (3-) 5-9 (-13) leaflets and basal stipules; the leaflets usually have a serrated margin, and often a few small prickles on the underside of the stem. Most roses are deciduous but a few (particularly from Southeast Asia) are evergreen or nearly so.
The flowers of most species have five petals, with the exception of Rosa sericea, which usually has only four. Each petal is divided into two distinct lobes and is usually white or pink, though in a few species yellow or red. Beneath the petals are five sepals (or in the case of some Rosa sericea, four). These may be long enough to be visible when viewed from above and appear as green points alternating with the rounded petals. There are multiple perkasa ovaries that develop into achenes.[4] Roses are insect-pollinated in nature. Situs Bola Online
